<template>
  <div class="list" ref="wrapper">
    <div>
        <div class="area">
            <div class="title border-topbottom">当前城市</div>
            <div class="button-list">
                <div class="button-wrapper">
                    <div class="button">{{this.currentCity}}</div>
                </div>
            </div>
        </div>
        <div class="area">
            <div class="title border-topbottom">热门城市</div>
            <div class="button-list">
                <div class="button-wrapper"
                v-for="item of hot"
                :key="item.id"
                @click="handleCityClick(item.name)">
                    <div class="button">{{item.name}}</div>
                </div>
            </div>
        </div>
        <div class="area"
             v-for="(item, key) of cities"
             :key="key"
             :ref="key">
            <div class="title border-topbottom">{{key}}</div>
            <div class="item-list">
                <div class="item border-bottom"
                     v-for="innerItem of item" :key="innerItem.id"
                     @click="handleCityClick(innerItem.name)"
                >{{innerItem.name}}</div>
            </div>
        </div>
    </div>
  </div>
</template>

<script>
import Bscroll from 'better-scroll'
import {mapState, mapMutations} from 'vuex'
export default {
  props: {
    hot: Array,
    cities: Object,
    letter: String
  },
  name: 'CityList',
  computed: {
    ...mapState({
      currentCity: 'city'
    })
  },
  methods: {
    handleCityClick (city) {
      this.changeCity(city)
      this.$router.push('/')
    },
    ...mapMutations(['changeCity'])
  },
  mounted () {
    this.scroll = new Bscroll(this.$refs.wrapper)
  },
  watch: {
    letter () {
      if (this.letter) {
        const element = this.$refs[this.letter][0]
        this.scroll.scrollToElement(element)
      }
    }
  }
}
</script>

<style lang='stylus' scoped>
 @import '~styles/varibles'
 .border-bottom
  &:before
    border-color: #ccc
 .border-topbottom
  &:before
    border-color: #ccc
  &:after
    border-color: #ccc
.list
 overflow hidden
 position:absolute
 top: 1.58rem
 left: 0
 right: 0
 bottom: 0
 .title
  line-height: .54rem
  background: #eee
  padding-left: .2rem
  color: #666
  font-size: .26rem
 .button-list
  overflow hidden
  padding: .1rem .6rem .1rem .1rem
  .button-wrapper
   float: left
   width: 33.33%
   .button
    margin: .1rem
    padding: .1rem 0
    text-align: center
    border: .02rem solid #ccc
    border-radius: .06rem
 .item-list
  .item
   line-height : .76rem
   padding-left : .2rem

</style>
